Lock



June 26, 1928.

W. J. CARROLL.

LOCK"I Filed July 50, 1921 2 Sheets-Sheet l June 26, 1928. 1,674,759

- w. J. CARROLL.

LOCK

Filed-@1y so, 1921 2 Sheets--Sheet 2 Patented .lune 26, i988..

narran LLIAIi/I J. CARRGLL, F VEST HAVEN,

CNNEOTICUT, ASSGNOR TO SARGENT &

COIVILDANY, OF NEX/V HAVEN, CGNNFICTICUT.

LOCK.

Application led July 30, 1921. Serial No. 488,611.

rectly operable respectively by keys inserted and outside of Athe door,but so connected with each other that the preti-action o1 either one otthese bolts will cause the 1retraction of the other if the latter is inprotracted position. Either bolt may, however, be protracted andretracted independently of the other bolt when the latter is inretracted position. lt is also desirable to provide such a lock with amovable ward which is sometimes placed in the path of certain oiC thekeys to prevent operation ot the lock thereby.

One object of this invention is to provide a lock of this character witha removable operating mechanism which may be made and assembled withoutthe lock case and thereafter inserted within the case in` operativerelation to the two bolts, so that the various functions which arerequired in such a lock may be performed.

Another object of this invention is to pro-r vide an operating`mechanism for locks of this charac er, so that at least one oit thebolts, usually the outside bolt, will normally he under the control of atumbler mechanism operable only by a suitable key and at the same timeprovide meansv operable by the other or inside key to release theoutside bolt from the control of the tumbler mechanism.

A still further object of this invention is to provide a lock ot thischaracter with a swinging or. pivoted ward which will be a part ot theremovable operating mechanism ot the locks and will cooperate with thekeys thereotY to effectively prevent the operation oit the bolt bycertain ofi the keys.

Still another object of the invention is to provide a'removable lockoperating mechanism which is capable or" installation between the twobolts with which locks of this charonly at the inside actor areprovided,in such a position thatY the operating parts oit the mechanismwill cooperate with the two bolts which are mounted in the case.

Another object of this invention resides in.

which lead the provision of a novel operating means for locks of thischaracter having an inside and an outside bolt, so connected that theprotraction of one when the other is in protracted position will retractthe latter.

To these and other ends the invention consists in the novel -eatures andcombinations of parts to be hereinafter described andk claimed.

ln the accompanying drawings:

Fig. 1 is a front elevational view ot' a lock embodying my improvements,with the cover of the lock case removed to expose the operating`mechanism ot the same, the view being taken from the outside of thedoor.

Fig. 2 is a front elevational view of my lock taken from the sideopposite that shown in Fig. 1 and the cover being broken away to exposethe operating mechanism from the other side.

Fig. 3 is la sectional view on line 3-3 of 'Fig 1;

Fig. 4 1s a sectional view on line 1r-4@ o .Fia l;

Fig. 6 is a sectional view on line 6 6 of F 1; 4

Fig. 7 is a view similarl to Fig. 1, but showing the position of `theparts when the outide bolt has been protracted by the guest 1651;

Fig. 8 is a view similar to Fig. 7, but showing the inside boltprotracted by the guest iev;

Fig. 9 is a view similar to Fig. 7, but showing the outside bolt inthe'position occupied by it when it is protracted by the display key;and y 10 is a view similar to Fig. 7, showing theposition of the partsas the outside bolt being` protracted and the inside bolt is beingretracted, both operations being performed by the movement of theemergency my;

Fig. 11 isa sectional view on line 11-11 ot Fig. 10; and I Fig. 12comprises a number of ldetailed views showing the. operations' of thevarious keys.

To illustrate the principles of my invention, I have shown at 10 a lockcase provided with the usual face plate 11. While the lock shown is onecommonly called a 5 is a sectional view on line 5--5 of morti se lock,it will be obv-ions that the prin llo vthe yoke is provided with aiinger 19 posi- `tioned to Contact with a cross-head 2O mounted upon thestom 21 of the latch bolt. The parts just describedare of usualconstruction and no novelty resides therein ex cept in combination withmy improved oper ating mechaiiism to be described below.

The lock case .is shown provided with anv outside bolt 22 andan insidebolt 23. The terms outside bolt47 and inside bolt are used to referrespectively to bolts which are operated by keys from the outside andinside ofthe door. lt usual in locks of this construction to havekey-holes forsuch keys in one side only of the door. For instance,

Ythe upper bolt 22 is operated by a keyr insert-ed from the corridor,while the lower bolt 23 is operated by a key inserted from the inside ofthe door, or by a person within the roomv with which the doorcommunicates.

rlhe stem 2li of the bolt 22 is of peculiar configuration, extendingupwardly from the bolt head and then rearwardly alongthe upper portionof the lock case. It is pro` vided upon the lower edge of the rearwardlyextending portion with a recess 25 to receive a finger 26 mounted upon akey oper ated slide to be described in detail herein'- after. The bolt23 is also provided with a stein 27 of peculiar configuration which eX-tends downwardly adjacent the bolt head and then rearwardly in agenerally horizontal direction toward the rear end of the lock case. lfdesired, a post or posts 2S may ybe mounted in the case to act as guidesfor the bolt stem.' The stem is also provided with an upwardly facingrecess 29 in its upperl edge to receive a. finger 30 formed upon a keyoperated slide 31.

The operating mechanism of my lock which actuates the bolts 22 and 23 iscapable of manufacture and assembly as a unit without the lock case andthereafter insertable within the case. For this arrangement I providetwo supportingr plates 32 andi-33 connected byA a plurality of posts orthe like 34, upon which the operating mechanism of the lock is mounted.The complete mechanism can then be assembled without the case and placedin position therein between the two bolts 22 and 23 making operativeconnection` with a small recess 42, as clearly shown in y Fig. 2, and isalso provided at its rear end with a finger a3. The recess tif visadapted to receive a stump ati-2 upon the slide 31 (Fig. 8) when thelslide is in its forward position crnresponding to the position vofprotraction of the bolt and hold the bolt in this protracted positionuntil the tumbler is moved to release the stump.

dotted lines in Fig. 1, the rear face of the tumbler preventing themovement of this slide to the left in Fig. 1 to protract the bolt untilthe tumbler has been moved to inoperative position. Such a movement isaccomplished by the key bit, as shown in Fig. 10, the tumbler beingswung upwardly orcounterclockwise about its pivot to release the stumple upon the slide. The tumbler 39 is also provided with an upwardlyextending arm d6, the function of which will be described hereinafter.rlhe stemv 2 7 of the bolt 23 is provided with a inger L17, which isadapted to be disposed behind the head of the latch bolt when the bolt28 is protracted` so as to dog or dead lock the latch belt againstmovement -by the knob.- Consequently, when the door is locked from theinside by the protraction of this inside bolt 23, the latch bolt isdogged by the finger 27 and the knob lo cannot be turned, and thus a.chambermaid or other person may ascertain whether or not the door islocked from the inside by merely trying the knob. p

To operate -the upper or outside boit mi, I have provided a slide uponwhich the linger 26 is formed. rl'he shape of this slide 50 is moreclearly shown in Fig. 2, where, as illustrated, the slide is providedwith the talons 51 and 52 to be engaged by the key and the slots 53 and5dislidably supporting` this member upon posts Pivotally mounted uponanother of the posts 3ft are a plurality of swinging ti'in'iblers 55,(three of there tini'iblers are shown Vin the drawings, but the numbermay be varied, if desired), each provided with a ringer 5G, normallyrexting upon a stump 57 provided upon a detent 58 (Fig. 9) pivoted uponone of the posts 34. The tumblers are normally urged in acounterclockwise direction by a plurality of springs 59 andthe detent 58is normally urged in a counterclockwise direc- The fingerv e311 isyadapted to rest upon this stump when ythe slide is in its retractedposition, as shown in tion by a spring 60. A post 58 secured to theplate E2 and acts as a stop to prevent the detent 'WQ from being swungby the are adapted to receive the stump 57, and

permit the detent S to swing in a clockwise direction m opposition tothe torce ot the spring 60. It will, of course, be understood f thatthese tumblers may only be so aligned by the use oiL the proper key orkeys arranged for the particular lock under consideration.

T'he detent 58 is provided with a V-shaped i lower edge formed by thetwo bevel surfaces 62 and 63. which'cooperate with correspondinglyshaped bevel surfaces 64 and upon a member 66 pivoted at 67 upon theslide 50. The member 66 i; provided with a straight lower edge which isadapted to rest upon theupper edge ot a member 68 pivoted upon one otthe posts 34 and supported by the arm 46 ot the tumbler 3) to normallylie in a horizontal position, as shown in Fig. 9. Tt will be apparentthat with the parts in this position, the member 66 is adapted to bemoved forwardly and rearwardly with the slide 50, the pivoted memberriding upon the upper face ot the 'if member 68.

The member 68 is normally supported in it?. horizontal position bycontact ot the arm 46 with a shoulder 69 formed thereupon. lWhen thetumbler 39 is moved in a counterclockwise direction by the key bitinserted through the inside keyhole 7 0, as shown in FiglO, the arm ismoved beyond this shoulder 65), as clearly shown in this gure, thusallowing the pivoted member 68 to drop to a lower position. This in turnallows the pivoted member 66 to tall to a position clear ot the detent58. so that the slide upon which .the member 66 is pivoted may beslidably moved rearwardly without the usual `clockwise movement oi thedetent 53.r In

this manner arrangements made tor releasing the slide 50 trom thecontrol ot the tumblers so that the bolt 22 may be retracted at certaintimes by theA action ot a key inserted in the inside keyhole 70 withoutthe operation ot the tumbler mechanism.

A pivoted member or walking beam 71 is pivoted at 72 to the plate 32,one end ot which' il adapted` to engage the slide 50, while the otherend is adapted to engage the slide 3l. This walking beam is so arrangedthat only one ot these slides may be in protracted position at. one timeand so that the protraction ot one ot the slides will retract the otherit the retraction ot the lat-- ter is permitted by the controllingtumbler mechanism. For instance, as shown in Fig. d. if a key if.inserted in the outer keyhole T3, which will protraet the bolt 22, the

walking beam 7l, which contacts with the slide at its upper end, will beswung in a counter-clockwise direction, and the lower end ol this beamcontacting with the slide 31 will urge this slide to its rearward orretracted position.

I have already described the manner in which'the upper bolt is releasedfrom the control oit itsv tumbler mechanism to be retracted yby a keyinserted through the inside keyhole when the lower bolt 23 is moved toprotracted position. In order that the opposite arrangement may beprovided and that the tumbler 39 may be moved from the position shown inFig. 8 where the bolt 23 is locked in protracted position by the stem 44being received in the recess 42 ot the tumbler, I have provided a lever74 having a downwardly extending end 7 5 provided with astirrup 76 inthe form of a laterally projecting lug `which is adapted to engage belowthe linger 43 and raise the tumbler 39 to release the stump Thisposit-ion of the -parts is shown in Fig, l0 where the bolt 23 is beingretracted by means ot the key inserted through the `upper keyhole 73 andactuating the upper bolt to protracted position. The lever 74 isvprovided with an elongated slot 77 by which it is loosely mounted uponthe same post 34 which pivotally carries the tumblers 55 and is urged ina clockwise direction by the spring 7 S. This lever is also providedwitha horizontally extending arm 7 9, which, as clearly shown in l andl0, well as in Fig. 5, lies closely adjacent the tumblers 55. Tt will beapparent that when the proper key is inserted in the upper or outsideopening 73, the bit ot the key will Contact with the arm 79 andwillserve to raise this lever `trom the position shown in Fig. 8' to thatshown in Fig. 10, sothat the stump 44 will be released by the tumbler.

A small ward 8O is formed upon the lower slide 3l and when this slide ismoved to bolt protracting position, this ward is moved forwardly, asshown in Fig'. l0, so that it will prevent the insertion of any exceptcertain keys into the upper keyhole. As shown, only the emergency keymay bel inserted into the upper keyhole when the slide 31 has been movedto protracting position by the key inserted through the inside or lower-keyhole 70. Upon the same post 34 which carries the tumblersv and thelever 74 is pivoted a swinging ward 81, the operation oi' which will nowbe described. This ward contains a large clearance opening 82 for thereception of the stump 26 and an elongated slot 83 to receive the post34 upon which the detent 58 is pivoted. Communicating with the slot andopening are three recesses 84 which are adapted to receive a post 85mounted upon the slide 50 when the latter is moved to bolt protractingposition. This ward is normally llt) all)

urged in a counterclockwise direction by the spring 86.

lThe mechanism shown is adapted to be operated by a plurality o keys,live of which are shown in Fig. l2, as tollowspthe guest key 87, themaster key or chambermaids key 88,-the grand master key 89, the displaykey 90 and the emergency key 91. f

The operation oit the mechanism is as vfollows: vWhen the occupa-ntleaves the room and locks 'the door trom the outside by the insertionoit the guest key 87 in the upper keyhole 73, the tumblers 55 are movedto a proper aligning position, so that they will receive the stump 57`to permit the detent 58 to be moved in a clockwise direction againstthetension ot the spring 60, under the impulse of the bevel face 64, whichcontacts with the tace ('33, thus allowing the pivoted member 66,together with the slide 50 to be moved forwardly to bolt protractingposition. The

lpivoted wardl 8l is moved upwardly in a clockwise direction by the keybit until the stump 85 upon the slide is received in the i lowest ot thethree recesses 84, as clearly shown in Fig. 7. When the ward is in thisposition, the operation ot any of the live keys is permittedand it willbe moved to this position by the guest key, the maids key, or the grandmaster key. l/Vhen, however, the display key 90 is used to actuate thebolt 22 from the outside, the ward will be moved to such a position thatthe stump 85 is received in the intermediate one of therecesses 84 andthe ward will in this position prevent the operation ot any one of thethree keys 87, 88 or 89 of lower order. rlhis provides for the usuallocking of the door from the outside by thedisplay key, so thatno one,not even the chamber-maid, can enter the room in the meantime, exceptwith the display key or with the emergency key 90, which will alwaysopen the door from the outside without regard to which key has been usedto lock the fi same,l `When the door has been locked 'from the outsidewith the emergency key, thelpivoted' ward 8l is not moved, but .ispermitted vthe operation of any of the keys of lower order, including`the display key, is prevent ed. Consequently, .when the door has beenlocked bythe emergency key from the outsi'ile, it can only be opened bya like key'.

The position ot' the parts when the door has been locked V'from theinside by the guest key is shown in Fig. 8. It is apparent that theextension 92 upon the slide 31 prevents the entire rotation of the keyand thus prevents its withdrawal from the lock case, while the bolt inprotracted position. lt now with the door locked 'from the inside theproprietor or someone provided with an einer gcncy key (the insertionet` any other key vinto the upper keyhole being prevented by the ward80) desires to enter, he may do so by inserting the key in the upperkeyhole and turning it to protract the upper bolt 22. `'llhe bit of thekey will at this time engage the varm 79 et the lever 74 and raise thislever from the position shown in Fig. 8 to the position shown in Fig.10, wherein the stirrup 76 which engages the finger 48 upon the tumthewalking` beam 7l actuated by the slide 55 to retract the slide 31 andthereby retract the lower bolt 23. lt the emergency key is new turned inthe opposite direction, the up per bolt, which has just been thrown toprotracted position when the lower bolt was retracted, will in turn beretracted without atteeting the position of the lower bolt and theproprietor will be able to open the door. lVhen the bolt 28 is movedtrom the position shown in. Fig. l to protracted position shown in Fig.8, the lever 74 will be swung about the post 34. upon which it ispivoted, by its spring 78, so that the stirrup 7 6 will be engaged belowthe finger 43.

I have just described the manner in which the tumbler 89 cooperatingwith the lower bolt 23 may be controlled by the emergency key insertedin the upper keyhole, so that the door, when locked upon the inside, maybe unlocked from the outside. I will now describe the manner in whichthe door when locked from the outside and the occupant is inadvertentlylocked within the room may be opened by the guest key from the inside.To secure this function it is necessary to operate the tumblers 55 by akey inserted in the lower keyhole or to release the upper bolt from thecontrol ot' these tumblers. I prefer to emliti ploy the latter methodand :for thisreason have provided the pivoted supporting` member 68carrying the pivoted pawl 6G. The position of the parts when the upperbolthas been locked from the outside is shown in Figs. 7 and 9, themember 68 being; maintained in a substantially horizontal position bymeans ot the shoulder 69 formed upon the same riding upon the upper endof the arm 4.6 oi the tumbler 39. W ith the part-s in this position, ifthe guest desires tounlock the door from the. inside` he may insert hiskey within the loweil keyhole and turn it in a direction to move thelower bolt to protracted posit-ion. The Contact ot the key. bit with thearm 4l of the tumbler 39 swings the arm 46 clear of the shoulder 39 andallows the pivoted member 68 to drop down, thus allowinga. similarmovement to be enjoyed by the member 66. This releases the mem` ber 66:trom the controlv ci? the det-.cnt 58' member t connected 'tube nioveo.wat

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wardly by the walking beam 71, the lower end ot which is moved forwardlybythe slide 3.1, thus moving the slide 50 rearwardly and retracting 'theupper bolt 2Q. The occupant ot the room may now turn his key in theopposito direction `and retract the lower bolt wit-hout aiecting theposition of the upper bolt and the door will be unlocked.

lNliat I claim is:

1. In a lock, a case, a pair oit bolts lmounted -to move to retractedand protracted posi tions -relatively to the case, and key actuatedmechanism located entirely therebetween to operate the bolts.

Q. In a loch, a case, a pair ot' bolts mounted to more to retracted andprotracted positions relativelyv to the case, said bolts having stemsentonding rearwardly into the case, and key actuated operating mechanismfor said bolts, said mechanism being positioned v entirely between saidstems.

In a lock, a case, two bolts having diverging stems extending rearwardlyinto the case and mechanism located entirely between the stems foroperating` the bolts.

11. In a lock, a case, a pair ot bolts movable to protracted andretracted positions, and a slide connected with each ot said bolts tooperate the same, both osaid slides lying between said bolts.

5. A.' loci; case, two reciprocable key operated bolts mounted therein,and mechanism :tor operating` the bolts, said mechanism ybeing' operatedby keys inserted between said bolts.

6. In a lock, a lock case, two bolts mounted therein,operating mechanism:t'or said bolts, located therebetween, including tumbler mechanism andslides controlled thereby.

7. A lock case, a pair ot spaced bolts mounted therein and operatingmechanism located entirely between said bolts to effect independentoperation thereof.

8. A lock case, a pair of spaced bolts mounted therein and operatingmechanism located entirely between said bolts to etect the retraction ofone bolt when the other is protracted.

9. A lock case, a pair of spaced bolts mounted thereinand operatingmechanism located entirely between said boltsvto effect the retractionot either bolt when the other is protracted.

10. A lock case, a pair otspaced bolts mounted therein and operatingmechanism located entirely between said bolts, including tumblers forcontrolling each of the bolts, a lrey tor operating eac-h ol' said boltsand means tor controlling the tumblers of one bolt by the key of theother to permit the retraction ot' the former when the latter isprotracted. i i

11. In a lock, a case, av pair of reciprocable bolts mounted therein anda removable swinging tumbler mechanism mounted in the case for operatingboth of said bolts and having independent connection therewith.

12. In a lock, a case, a pair ot reciprocable bolts mounted therein anda unitary operating` mechanism tor both said bolts, said mechanismhaving independent connection to said bolts.

13. In a lock, a care, a pair of reciprocable 16. In a lock, a case, apair of bolts rey ciprocably mounted therein, a -frame removably mountedin the case and carrying mechanism for operating both of said bolts.

17. In a lock, a case, aepair ot' bolt-s reciprocably mounted therei atrame mounted in the case and carrying -a slide to operate each o'fsaidbolts. p

f 18. In a lock, a case, a pair ot bolts reciprocably mounted therein, aframe mounted in the case between said bolts and carrying operatingmechanism, including controlling tumblers for both bolts. y

19. In a loch, a case, a pair of bolts reciprocably mounted therein, atrame removably mounted in the case between said bolts andcarrying.operatingfinechanism, including controlling ,tumblers vfor bothbolts.

20. In a lock, a case, a pair orn bolts reciprocably mounted therein, atrame mounted in the case and carrying a slide to operate each ot saidbolts, andtumbler mechanism to control said slides.

2l. In lock, a case, a pair oi spaced bolts reciprocably mountedtherein, and mechanism, tor operating both oi the bolts, insertable as aunit into the casing.

Q2. In a lock, a case, 'a p airl ot spaced bolts reciprocably .mountedtherein, and mechanism, for operating both ot the bolts, insertable asIa unit into the casing, said mechanism including means to el'lect theretraction ot lone ot said bolts when the other is protracted.

23. In ,a lock, a case, a pair ot spaced bolts reciprocably mountedtherein, and

mechanisnn for operating both ont the bolts,

insertable a unit into the casing, said mechanism including means toeitect the retraction of either oit said bolts when the other isprotracted.

,24. In a lock, a case, a pair ot spaced bolts reciprocably mountedtherein, and mechanism, tor operating both ot the bolts,

Sill

insertable as a unit into the casing, said mechanism havingtumblers tohold said bolts in protracted position, a key for each of said bolts andmeans whereby the operation of one oi said keys to protractone o'l thebolts renders the tumbler-s inelfectiveto l hold the other boltprotracted.

f ol one of said keys to protract one ott the lbolts renders thetumblers ineffective' to hold the other bolt protracted, and means toretract said last named bolt when the first is protracted.

26.l In .a,lock, a case, a pair ot bolts reciprocably mounted therein, areciproeable slide for operating each of said bolts, and meansconnecting said slides whereby the protraction of one effects theretraction of the other the latter is in protracted position.

27. In a lock, a case, a pair of bolts reciprocably mounted therein, areciprocable slide for operating each of said bolts, 'and tumblermechanism for each of said slides to hold them in protracted position, akey for each ot said slides and means whereby the operation ot a key forone slide renders the tumbler` mechanism in-eitective to hold the otherin protracted position.

28. In a lock, a case, a bolt reciprocably mounted therein, a framemounted in the case and carrying tumblers to hold said bolt in a givenposition until operated by the proper key and means alsoA carried by theframe to release said bolt :trom the control o1" the tumbler mechanism.

29. A. lock having a case provided with a reciprocable bolt, a trameremovably mount ed in the case and operating means for the bolt mountedon the trame including a detent for holding the bolt in a givenposition, tumblers to control the operation otl said detent and means topermit the operation of said bolt irrespective of the control ot saiddetent by the tumbler mechanism.

30. A lock having' a reciprocable bolt, an

Ioperating slide separate from the 'bolt and connected thereto, a detentto control the operation ot the slide, and means to tree said slide fromthe control of said detent.

3l. A 'lock having a reciprocable bolt, an operating slide separatetromthe bolt and connected thereto, a tumbler controlled detent to controlthe operation of the slide, and means to free said slide from thecontrol ot' said detent.

32. A. lock having a reciprocable bolt, an operating slide separate fromthe bolt and connected thereto, a detent to control the operation ot theslide, a pivoted member on the slide engaging With said detent and meanspermitting withdrawal of the pivoted member `from engagement With saiddetent.

33. A lock having a reciprocable bolt, an operating slide separate fromthe bolt and connected thereto, a detent to control the operation ot theslide, a pivoted member on they slide engaging with said detent, a.second pivoted member supporting the iirst in engaging positionl andmeans to permit the Withdrawal ot said second pivoted member from itssupporting position.

34. A lock having a reciprocabl'e bolt, an operating slide separate''from the bolt and connected thereto, a detent to control the operationofthe slide, and key operated means to iree said slide from control ofsaid detent. 35. A lock having a reciprocable bolt, an operating slideseparate from thefbolt and connected thereto, a detent to control the op`eration of the slide, a pivoted member on the slide engaging with saiddetent and key operated means to free said pivoted member from saidengagement. 36. A lock provided With a reciprocable bolt having a stem,a slide for operating said bolt, said slidebeing formed separately fromthe stem and connected thereto, a detent tor controlling said slide,tumbler mechanism to control said detent, said tumbler mechanism beingoperated to control the detent and permit the bolt tobe moved by a key,and means operable by a second key to tree said slide from control ofthe detent. y 37. A lock having a pair of reciprocable bolts, tumblermechanism for operating each of said bolts, a detent tor controlling theY position of one thereof and controlled in turn by the respectivetumblerl mechanism and means operated by the tumbler mechanism of thesecond bolt to release the first t bolt irrespective of the control ofits detent by the respective tumbler mechanism.

38. A lock having a case provided with a reciprocable bolt, a 'trameremovably 1nounted in the case, and operating means for the bolt mountedon the trame, including a detent for holding the bolt in a givenposition, and means to tree said bolt from control of said detent;

39. A lock provided with a pair of reciprocable bolts, a detent torholding one of the bolts in a given position, tumblers to control thedetent, and means associated with the second bolt to permit theoperation of the lirst bolt, irrespective of the cont-rol otsaid detent'by the tumblers.

, 40. A lock provided with a pair otreciprocable bolts, a detent forcontrolling the position oli' one of said bolts, tumbler mechanism Jforcontrolling said detent, said tumbler mechanism being operated torelease the bolt by a key, the other bolt being operable by a secondkey, means operable by said second key to release the lirst bolt tromcontrol ot said detent.

4l. A lock having a pair of reciprocable bolts, tumbler mechanism foroperating each ot' said bolts, a detent for controlling the position ofone thereolf, a pivoted member movable with said one bolt engaging thesaid detent, said tumbler mechanism being operated, and said bolt beingmoved by a key, the tumbler mechanism of the second bolt being operableby a second key to move the latter, and means operable by the secondnamed key to release said pivoted member from engagement with saiddetent to permit movement ot the said lirst bolt, irrespective ot theposition of its tumbler mechanism.

42. ln a lock, a case, a pair of bolts reciprocably mounted therein,tumbler mechanism, means cooperating therewith to control one ot saidbolts and hold it in either protracted or .retracted position, a tumblerfor said second bolt and means whereby the operation of said last namedtumbler moves said cooperating` means and releases said lirst named boltfrom the control or' its tumbler mechanism, irrespective of thecondition thereof. A

43. In a lock, a pair of reciprocable bolts, a plurality ot tumblers andmeans engaging the tumblers for controlling one ot' said bolts andholding it in protracted or retracted position, a tumbler 'forcontrolling the operation of the second bolt, means for moving saidengaging means and freeing the first bolt from the control ot' itstumbler mechanism, irrespective of the position thereof, said meansbeing controlled by the tumbler of said second named bolt.

44. ln a lock, a case, a pair of reciprocable bolts mounted within thecase, a detent to hold one oit said bolts in either protracted orretracted position, tumbler mechanism to control said detent, a tumblerto control the movement of said second named bolt, and means undercontrol of the tumbler for said second bolt to release said detent fromcontrol ot its tumbler mechanism and permit movement ot said first namedbolt.

45. A lock having a pair of reciprocable bolts, a detent, means toengage said detent to control the operation of one of said bolts,

a tumbler to hold the other bolt in either protracted or retractedposition, and means whereby thel actuation of said tumbler will movesaid engaging means and tree said first named bolt from the control ofsaid detent.

46. ln a lock, a case, a pair of bolts reciproeably n'iounted therein,tumbler mechanisms tor controlling the operation of each of said bolts,said t-umbler mechanisms being normally operable independently oteach.

other, and means tor `etliecting the operation of said tumblermechanisms for operation by the same key when one of said bolts is inprotracted position.

47. A lock provided with a pair of key actuated horizontallyreciprocable bolts, a movable detent and cooperating means for holdingone ot the bolts in a given position, and means associated with theother bolt to move said cooperating means and Yfree the first named boltfrom control of said detent irrespective of the position of the latterwhen said other bolt is actuated by its key.

48. A lock provided with a pair of horizontally reciprocable bolts, amovable detent, means cooperating with said detent for holding one otthe bolts in a given position, and means associated with the other boltto move said cooperating means and thereby free the iirst named boltl'rom control ot' its detent.

49. A lockprovided with a pair ot reciprocable bolts, movable tumblermechanism, means cooperating therewith for controlling the position ofone of said bolts, said tumbler mechanism being operated to release thesaid bolt by a key, the other bolt being operated by a second key, andmeans operable by said second key to move the cooperating means andrelease the first bolt from control of its tumbler mechanism.

50. A lock having a pair ot reciprocable bolts and tumbler mechanism forcontrolling each of said bolts, the tumbler-s of one of said bolts beingoperable by a key, the tumbler mechanism of the second bolt beingoperable by a second key, and means also operable by said second key torelease the irst bolt from control ot its tumblers irrespective of theposition and without movement thereof.

ln witness whereof, l have hereunto set my hand this 15th day of July,1921.

1WLLIAM J. CARROLL.

